Beaks are like finger nails, keep growing, IF they are programed to do so--all chickens beaks do not not require clipping. But if you have one that does (I have several that keep overgrowing at the tip), just trim it with dog toenail clippers--I do, every time I see it getting too long to look like the bird can eat easily. Careful not to clip too short, to make it bleed, just to match the lower beak--but if you do, it will heal and grow again! Good luck.